when it's appropriate and criticizing them when it's appropriate. >> reporter: elizabeth warren has opened up a small lead over senator brown in recent weeks, but the race is too close to call. elaine quijano, cbs news, winchester, massachusetts. >> pelley: the pakistani school girl who was shot by the taliban makes a brave promise. we'll have it just ahead. ahead. ans living with pain. it could also mean living with joint damage. help relieve the pain and stop the damage with humira, adalimumab. for many adults with moderate to severe ra, humira is clinically proven to help relieve pain and stop joint damage. so you can treat more than just the pain. humira can lower your ability to fight infections, including tuberculosis. serious, sometimes fatal events, such as infections, lymphoma, or other types of cancer, have happened. blood, liver and nervous system problems, serious allergic reactions, and new or worsening heart failure have occurred. before starting humira, your doctor should test you for tb.